The Mack 12.47 Inch Long And 4 Inch Diameter Replacement Exhaust Pipe For OE 21478675 is a high-quality, stainless steel replacement part that is sold individually and directly replaceable with OE parts. It comes with clamps and gaskets included, making installation easy and hassle-free. This exhaust pipe is EPA 10 compliant, making it an environmentally friendly choice. It is made in the USA and fits most Mack makes and models, with a direct OE replacement number of 21478675. With a length of 12.47 inches, a diameter of 4 inches, a width of 4.64 inches, and a height of 4.72 inches, this exhaust pipe is a practical and reliable choice for your Mack vehicle.